From patchwork Wed Sep 23 20:37:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 272917 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 161F2C2D0A8 for ; Wed, 23 Sep 2020 20:38:17 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 80AC320725 for ; Wed, 23 Sep 2020 20:38:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZB0nBtnW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 80AC320725 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51198 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLBWo-0007bW-VZ for qemu-devel@archiver.kernel.org; Wed, 23 Sep 2020 16:38:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52350) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLBW3-0006lD-Ua for qemu-devel@nongnu.org; Wed, 23 Sep 2020 16:37:27 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:47685) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLBW2-0007ju-51 for qemu-devel@nongnu.org; Wed, 23 Sep 2020 16:37:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600893445; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wHQHYqUjI9wcLEM8ZW7E1CqaYcgjF/cF21GUP/vPPAo=; b=ZB0nBtnW9x3y+p6wy5em3PZg4LpCX7T7il1itKIoBT7MW6AF2UKTEnio5U9jnsWZXPT81z KVknxXi06syXQBvH+IryEl+YQFyLHLs9S3g9JTEnA9mKR3wNUucfljqL39w+jjx0F1Inzp ef4/hZeoNycEyXUlT1VsaD20ONJgSs4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-235-u3bNlIUiNDSC00eqRCdXMQ-1; Wed, 23 Sep 2020 16:37:23 -0400 X-MC-Unique: u3bNlIUiNDSC00eqRCdXMQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 84A2C425CE; Wed, 23 Sep 2020 20:37:22 +0000 (UTC) Received: from blue.redhat.com (ovpn-114-2.phx2.redhat.com [10.3.114.2]) by smtp.corp.redhat.com (Postfix) with ESMTP id 29C2173668; Wed, 23 Sep 2020 20:37:22 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Subject: [PATCH] docs: Better mention of qemu-img amend limitations Date: Wed, 23 Sep 2020 15:37:19 -0500 Message-Id: <20200923203719.732958-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.228, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Missed during merge resolution of commit bc5ee6da71. Signed-off-by: Eric Blake --- docs/tools/qemu-img.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst index c35bd6482203..2b5891b54db7 100644 --- a/docs/tools/qemu-img.rst +++ b/docs/tools/qemu-img.rst @@ -265,6 +265,10 @@ Command description: --force allows some unsafe operations. Currently for -f luks, it allows to erase the last encryption key, and to overwrite an active encryption key. + The set of options that can be amended are dependent on the image + format, but note that amending the backing chain relationship should + instead be performed with ``qemu-img rebase``. + .. option:: bench [-c COUNT] [-d DEPTH] [-f FMT] [--flush-interval=FLUSH_INTERVAL] [-i AIO] [-n] [--no-drain] [-o OFFSET] [--pattern=PATTERN] [-q] [-s BUFFER_SIZE] [-S STEP_SIZE] [-t CACHE] [-w] [-U] FILENAME Run a simple sequential I/O benchmark on the specified image. If ``-w`` is